Regenerator flow distribution control



March 16, 1954 cfoTTo 2,672,437

REGENERATOR FLOW 'DISTRIBUTION CONTROL Filed July 30, 1951 3 Sheets-Sheet l :fg d s CL Rimmxmxmm INVENTOR ATTORNEY March 16, 1954 C, OTTO REGENERATOR FLOW DISTRIBUTION CONTROL 3 Sheets-Sheet Filed July 30, 1951 INVENTOR CFI RL OTTO BY- :l E ATTORNEY March 16, 1954 C. OTTO REGENERATOR FLOW DISTRIBUTION CONTROL Filed July'o, 1951 s sheets-sheet s INVENTOR CHRI.. OTTO Patented Mar. 16, 1954 Simfree PATENT @FFME REGENERATORFL CON W DISTRIBUTION TROL f Carl Otto^,-Manhasset, N. Y. Application J ulm-30;l 1951, SerialmNot239,253A

Theepresent invention: relates to,-the..construc.

tion of a. regenerative f byfprod-uct coke. oven..

battery.- oi. the .-typecomprisingvhorizontally .elongated, coking chambers *extendingI transversely of .the battery and` alternating .with Yheating vvwal-ls each of .which includes avhorizontal-.rowYotvertiealvheatingnues; and regenerator chambers. be-

low the .coikng-gchambers and-heating wallsuand extending-,transversely of the battery, .and chan acterized by ,-.the connection .of ther upper'. ends. of-

a plurality-.of said/nues in'eachheating wall to antupperrhorizontal channel in said. wall, and the.:` connection Lo1?. the. lower ends; of a plurality of :the heating` nues Vin-each' yheatingl wa11..to the upper.. edge of. the-same ,regenerator chamber, and-fte. the-:connection 1of.the 1ower edgey ofA xeach regenerator chamber fto= a-subjacent `solechannel by` an plurality-,1' or ports f ors passages distributed along,- theu length of.y said channel.: Coke oveny batteries: of- .f the above mentioned type are used inutheffproductionmf most i off the :metallurgical f coke producedin .fthisqcountryjnow andfor many years-:pasti` 4 The general object of the present :invention .is to.provide improved means-for controllingthe distributiom oa combustion agentsve through.` `:the:icoke'oven- -regenerators andfheating' iuessto thereby;l closely,l approximatethe heating .act-ion: referredto as: uniformheating?? The'intended purposefof uniform-heating?? is zthe... supply oily heat :to :thewdiierent heatingj uesffat i therratessrequired for vtheiefticient and suitablyl cok'ing ieiect :all along thelength; ,and-fromfthe.

toptoxth'e bottoma of .each` cokingnmassyf notai/ith.` standing.' the factthat' the-1 thickness ofeach.Y coking mass :varies from. one .end to ,theaother' rendr f ofsaidzzmass, andpmay'well be twentyupercent oven.; An,approximation-` to` uniformfxheating ofa1: coking `mass :is .a -aresult' :which .coke ,ovenh engineersy andffconstructors zhave'flong', recognized( as desirable, and for whichrthefworkersaimthe' art".have`\beeni striving for a halfcenturw or longerr Aaprimary cause of the failure to obtain the desired: .uniform `heating veffect with regenerativecoke ovensioffxthe :above .mentioned :typed is @thel practical. necessity. for passing combustion1 air and:1eani fuel :gas,i. if used, into the battery,- and forrwithdrawing, partially cooled heat-ing` I gases fromithe l battery through: the same elongated hor-izontalchannels .or bus. nues, each *ofr which has y.lateral branches. distributed. along. its .length Said. channels, extend transverselyof-.the battery, and in some cases are each of a length equal to How-ingr lgreaterzat one endsthanatithe other-end oftheV A 13Cl'aims' (Cl. 202-141) 2". thev widthV offth'e battery, andfin substantially' all".cases..each bus .e .is long enou'ghto. insure an appreciableavariation in the staticv air'or gas.. pressure .in ,the busnue alngv..the length vvoithe" j latter, `as aresultof .the variations. in the linear:

velocity. of 'lowin the passage at differentipointsA along r.its length..

The eiec't on the relative ratesof now through' present .invention,that Y it ,is `practically feasible. to improve'the -heat `distribution.incoke ovens ofi..

the above mentioned type y.byf.providing-7means.. tor utilizing. the gaseous streams .owing-.inthe regenerator sole channels.toa-automaticallyy vary.`- t

the effective cross sectional areas.. of the .ports 1 connectingvv tha loweredgewoiT eachbtransversef, regeneratorsection with.v its associated-v:n sole;

channel when the direction 4of* iiowthroughthat regeneratortisrreverseda In the practiceizoftthe.. present invention, I. I makefuse -of.-ap fval-ves. orf. dampers :each: arranged: .tobe .-movedv.between...af.

rst or second-position accordinglyfasthefow through lthe-ports Yis -into.,-or outY of-.- the associV atedregenerator,

The various` features .-of `novelty-whichuchazzacterizey my invention arepointed'y outwvithfpan- -v ticularity in the :claims .-annexed.to-.and-,forming; f

a part ofthis specilicationg` Forzarfbetterfunderf standing o-the invention, however, .tssadnantages, andzspecic. objects: attained fwith fits-fuse,R reference should -fbe.4 had to the accompanyingf. drawings *and descriptive mattei: rinpwhich YI havefillustratedfand. described atpreferredembodiment': of the-invention.-

Of' the drawings:

Fig. lis aftransversefvertical=-section of-'a coke-f f oven battery onf'ftheibrolemlineelyl rofFigr:.2

Fig.y 2 isa partial. vertical section iontheeline` 2 2 .of"Fig; 3;

Figaf 1 Fig. 4 Visa .reproduction onialalfger -sscaleand` example, the.. WilputteL Patent 1920, Becker Patenti Fig. 6 is an inverted plan View of the orifice members shown in Figs. 4 and 5;

Fig. 7 is a section taken similar to Fig. 5 illustrating a modication;

Fig. 8 is a section similar to Fig. 5 illustrating a second modification, and Fig. 8c is a iront elevation of the lower portion oi the orifice member shown` in Fig. 8;

Fig. 9 is a partial sectional elevation taken similarly to Fig. 4, of a coke oven battery of different type;

Fig. 10 is a partial section on the line it-iii of Fig. 9;

Fig. 11 is a section taken similarly to Fig. ll illustrating a modification; and

Figs. 12 and 13 are views taken similarly to Figs. 9 and 10, respectively, illustrating another modification.

In Figs. 1-6, I have illustrated a preferred form of the present invention incorporated in a horizontal under-red regenerative coke oven battery A of the so-called four divided type, illustrated, for example, in the Davis Patent 2,334,612 of November 16, 1943. The battery illustrated in the drawings is a so-called combination oven battery, adapted to be heated either by the combustion of a lean fuel gas such as blast furnace gas, or by the combustion of a rich fuel gas such as coke oven gas. In the conventional form shown, the battery A comprises a concrete layer a forming a supporting deck for the oven brickwork, and forming the roof of the conventional basement space A oi the battery A. 'Ihe deck a may be supported in any usual or suitable manner which need not be illustrated or described herein. The coke oven brickwork comprises an upper story or section and a lower story or section which merge into an intermediate horizontal masonry layer B. Each of said stories, as shown, is of well known commercial form except in respect to the means, hereinafter` described, which control communication between the lower edges of regenerator chambers and subjacent sole channels.

The upper story or section of the battery coinprises horizontally elongated coking chambers C alternating with heating walls, each of said chambers and walls extending from one side of the battery to the other. Each heating wall is formed with a row of Vertical heating fiues D extending from one end of the heating wall to the other. In the four-divided oven battery A., the llues D in each heating wall are divided into four sections, d', d2, d3 and d4. The flues D in each section are separated from one another by flue division walls e. Adjustable slide bricks or throttling dampers Da at the upper ends of the different nues, may be adjusted through oven roo channels in alignment with the flues, as is customary in ovens of the general type disclosed. The sections d and d2 are separated from one another by a vertical flue division wall E. Similarly, the sections d3 and d4 are separated from each other by a ilue division wall E. The sections d2 and d3 are separated from one another by a flue division wall EA which extends upward above the upper ends or" the other flue division walls. The ue division walls E and E in each heating wall are structurally like the respectively adjacent iiue division walls e. As hereinafter explained, however, the flues D in the dierent flue sections d', d2, d3 and d4 are so connected to regenerator sections in the lower story of the battery that the flow is upward or downward in the flue sections d2 and d3 during reversal pe- 4 riods in which the flow is respectively downward or upward in the flue sections d' and d4.

The ilue sections d2 and d3 are separated from one another by a vertical flue division wall EA which extends to a level above the level of the tops of the other flues and separates the adjacent ends of two aligned upper horizontal channels F and F formed in the same heating wall. All of the nues D of the iue sections'd" and d2 have their upper ends beneath and in direct communication with the channel F. As is hereinafter explained, the lower ends of the different iiues D in each heating wall are so connected to regenerator chambers in the lower story of the battery A that the flows through the diierent nues of the sections d and d4 are always in the same direction, at any one time, being alternately up and down, when the flows through the flues of the sections d2 and d3 are respectively down and The lower story of the battery A comprises a supporting or pillar wall G `beneath and parallel to each heating wall and extending from one side or the battery to the other. At one side of each pillar wall are a central regenerator section or chamber H and left and right end regenerator sections or chambers H and H2, respectively. At the second side of each pillar wall there are a central regenerator section or chamber h and left and right end regenerator sections or chamy bers h' and h2. Each set or row of regenerator sections or chambers H', H and H2 may be identical in construction with each set or row or regenerator sections or chambers h', h and h2. As is hereinafter described, the regenerator chambers H', H and H2 are used only in preheating combustion air, while the regenerator chambers h', h and h2 may be used either in preheating combustion air or in preheating a lean fuel gas, such as blast furnace gas, accordingly as the battery is heated by the combustion of a rich fuel gas such as coke oven gas, or by the combustion of lean fuel gas preheated in the regenerator chambers h', h and h2.

The regenerator chambers H' and h' at opposite sides of each pillar wall G have their upper edges connected to the lower ends of the flues D in the ue section d' of the heating wall above said pillar wall by passages or channels I and i, respectively, formed in the intermediate masonry layer B. Each of said iiues has its lower end connected to a passage I and to a passage i, each individual to that iiue. Similarly, each of the flues D in the ilue section d4 of each heating wall has its lower end each connected by an individual channel I or i to the respective regenerator' chambers H2 and h2 at opposite sides of the subjacent pillar wall. Each of the flues D in the ilue sections d2 and d3 of each heating wall has its lower end connected by an individual channel I and an individual channel i to the central regenerator chambers H and h at opposite sides of the subjacent pillar wall.

Beneath the row of regenerator chambers H', H and H2 or h', h and h2 between each two ad. jacent pillar walls G, are two sideby-side sole channels J and y' separa-ted from one another by a division wall g. Each sole channel J is in communication with the central regenerator chamber H or h above it at points distributed along the length of the chamber. Similarly, each sole channel y is in communication with the two end regenerators H and H2 or h' and h2 above it at points distributed along the length of each of the two end regeneratcrs. As is well known,

the 'side and-endedges of the port 1 are spaced inwardly awayfrom the corresponding edges of the port portion 2. The valve member Q formed and supported as described, is gravitationally biased toward its position shown in Figs. 4, and 6, in which it is in contact with the vertical valve seat 3.

When gaseous fluid to be preheated is flowing into a superposed regenerator chamber through an orifice member port O2 from an associated sole channel, the static pressure of the iluid will be higher in the portion of the sole channel adjacent the lower end of the port than in the latter. In consequence, the corresponding damper Q is then subjected to a fluid pressure differential which presses the damper against the valve seat 3, and the effective flow capacity of the corresponding port O2 is then directly dependent on the cross sectional area of the corresponding damper port 1. When the direction of ow through the port O2 isreversed, the waste heating gases flowing through that port into the subjaeent sole channel will have a pressure higher` than the static pressure in the adjacent portion of the corresponding sole channel. The fluid pressure differential force then acting on the valve member Q will move the latter away from the corresponding valve seat 3, and thus make the effective area of the bottom outlet from the port O2 larger than the cross sectional area of the corresponding port 1. Thus the eiective now capacity of each port O2 for a given difference in the pressures at the ends of the port, is greater when waste heating gas is flowing downward through the orifice member port C2 than when air or lean gas is passing upward through that port. By suitably proportioning the cross sectional areas of the orifice member ports O2 communicating with any one of the regenerator chambers H, H-h2 and suitably proportioning the ports 'l in the damper members Q associated with the ports O2 the effective fiow capacities of each of the flow paths formed by a port O2 and associated damper Q may be separately regulated as desired for ow in each direction between the regenerator and the subjacent sole channel with which it is in communication.

For the separate regulation of the relative rates of flow through the different ports O2 associated with a regenerator chamber, the fact that the volume of the down flowing gases exceeds the volurne of the upowing gases to be heated makes it practically essential that the regulation of the down flow through the ports O2 should be effected by proportioning the cross sectional areas of those ports, and that the regulation of the up flow through the ports O2 should be regulated by proportioning the associated dampers Q to thereby vary the eiective capacities for up flow through the ports l. Without regard to the matter of flow distribution through the different ports O2, the aggregate area of the down ilow paths through the orifice members -O may advantageously be greater than the aggregate area of the up iiow paths through those members because the waste heating gases are at a temperature substantially higher than that of the air or lean fuel gas passing upward through the oriiice member. As a result of the temperature difference, the volume and linear velocity of the gas flow through the upper ends of the ports O2 is greater than the volume and linear velocity of the up ow through the upper ends of the ports. In consquence, it is thus practically essential to make the minimum cross section area of the path of down ow through each orifice member O greater than the minimum cross sectional area of the up flowpaths through said member.

The use of the present invention makes it practically feasible to obtain a closer approximation to uniform heating than has been heretofore attainable in a coke oven battery of the particular "four-divided form illustrated in Figs. 1-3r herein, or in other forms of coke ovens in which gaseous uids flow alternately in opposite directions through a regenerator chamber and a plurality of side-by-side vertical flues connected in series between a sole channel communicating with the regenerator chamber at distributed points along the length of the sole channel and an upper horizontal channel above and in communication with the upper ends of said ues.

As those skilled in the art will recognize, use

Q may be replaced by a damper QA which omits Y the port l of the damper Q, but has its lower edge 8 intermediate the top and bottom walls of the lower outlet end portion 2 of the port O2 when the damper is in engagement with the seat 3. With the proper distance between .the bottom wall of the port O2 adjacent the valve seat 3, and the lower edge 8 of the damper QA whenthe latter engages said seat, the port O2 of Fig. 'l may have the same capacity for flow in either direction as the port O2 of Fig. 4.

In some cases it may be desirable to limit the extent of angular movement permitted a damper such as the dampers Q and QA. One arrangement for accomplishing this is shown in Fig. 8, and 8a. That arrangement differs functionally from the arrangement of Figs. 4 to 6 only in that each portion 6 of the orifice member OA of Figs. 8 and 18a includes a lateral projection 9 extending into the path of movement of the damper QB. The projections 9 limit the angular movement of the damper away from its seat 3 to a predetermined angle smaller than would other-v wise be given the damper by the waste gases flowing through the port O2 at the normal rate.

The damper QB diifers structurally from the damper Q in that its lateral pivots 4a are integral extensions of the damper body plate which may thus be a one piece sheet metal part. By

positively limiting the angular movement of the valve member away from the seat 3 as shown in Fig. 8, the extent to which the downflow capacity of a port O2 is increased by the clockwise movement given the valve Q by the downflowing waste heating gases is regulated. Such regulation may be effected in other ways, as for example, by

varying the cross sectional areas of the valve port 1 relative to the cross sectional area of the corresponding port O2, 0r by increasing the 'gravitational bias torque tending to hold the valve Q in engagement with its seat 3.

To permit the replacement of the orice members O and associated dampers Q for repair or cleaning purposes or to vary the relative flow capacities of different orifice member ports, each orifice member O may advantageously be supported by .and longitudinally movable on side wall ledges G' and g', as shown in Fig. 4. With the orifice members so arranged, they may be moved out of the battery and back into the latter when either end of the sole channel is opened for the purpose, as by means of a rod extending into the battery above the level of the tops of the orifice members and provided with a dei pending hook portion which'can 'beexterided Yinto the Voriiice O2 of each-orifice member.

Advantageouslyp andeas shown in itlign-d,I the individual :checker-bricks :R1 in-eachregenerator may ordinarily be of the familiar perforated 4block type asl shownffor'fexample,l inmy -prior Patents 2,018,223 of October V:22, 1935, yand 2,018,224 of' October 22,' `-l935,`vv'ithfeach' brick '-of a-length' approximately--equalto= the width of the regenerator chamber' in which"l it Y*is 'used, so that' the lowerbri'cksf'at'fthe bottom'lof the check* er brick mass maybesupported onI ledge lportions G2 of the pillar 1walls "G lat xopposite sides of the'regeneratorchamber.

Among other typesof rcoke ovensf-in'cwhich the present invention may be used with advantage, Ifmention' bywayoflexample' the vso Acalled cross overc'oke ovenl battery,v aneearlyform ofwhioh is'fshown 'by x the Becker-Patent No. 1,374,546. *In that patent thereff-is a single solechannel 1 ber-1eath-l each 'regeneraton as i is "fthe y*case v'in the cnstructionshowrr ir Figs.f-9 and A10. `'In thev arrangement'shown fin FFigs 9arid"v '10j 'the checker brick "stack ineach r-egenerator "chamber "may be arranged to formj a rowo vertical passages with a division vwall'S between v'the adj acentA passages. The -fwall 'S may lbe formed "by 'checker brick-fend walls'in-accordancewith'' vthe disclosure of vmy prioiPatent'2,049;272ffJu1y`28, 1936. *Asfshown in'Figsf-"Q and"10,"the'ohebke bri'ckmass is supported, on= arwf`f=brick blocks 'Texten'ding transversely'of 'the fbatteryand shapedv tov provide a grooved guideway"T""for'or`iice members O. `tThe latter may be likethememberso shown inf-Figs.` 4; 5Ak ariclfr 6. The v'blocks 'Ifalsdincludea plurality of vertically elongated spaced apart vanes` 'T2' extending lon'gitudinallyof 'the battery. The vanesT2 tend to'maintain thefsamegen'eral distribution ffow in the lchecl:er"'bri'ck -ma'ss as isf maintained at "the bottom-ofthe lregene'rator space VVby the Y actionf'TtheLproportionedfports/ O2 and i the- 'dampers Q 'associatewtherewith As shown; the lower' `edges of theffvanesi'TZrare Tdisplaced upwardly' from 'the subjacent -orficefmembers 0.

f`I'n`f`Figf 11,`- Ihave'illu'strated af-modication'of thearrangement shownf' in YFigs. "9i and 10, lfin which-`the orifice members 0' are replaced by orice cmembers Ol?, which diiler from the 'members 0"'ir1"thattftliey`I comprise* uprisingfportions O5. Therlatterfexteridfinto contact withmor close2proi irnity1to;-`regeneratordivisicnfwallsidirectly f above? theffproj ections :"05. IAsi *shown "fin Figi 11; theparts are= so" proportionedy that' there isa projection?*O5beneathf veveryfthiid division wall FS, lwand Ileach projection "O5 .'substantiallv closes* the ffends fftheeadj acent "'-spaceb'etween the" bo'diesff fea'ch'twm adjacentprice'members OBf arid the three 'checker `.briclrsRabovc'i that space. As f '"showm leach orifice f imember l -GB iis providdfvvith" tworfpo'rts', l'one-lat `=,a'ch-"sideY of thev '-up'rising'jprojectionf'ocof "the corresponding Ibla-te.

Tlviligs.; '12e and 13 illu'strate anarrangement 1in which-af` regenerator` chamberffHardlsole" 'cha-n-4 nel YJ 5e are' arranged'`ior'=useexclusively inl `preheatingifuel: fgasfiinf -a 'cokef' @ovenizfbattery frwhich may beef varioustypesfincluding thecrossmver type. ..As-shown, superposedccurses ofrefractory elementsU'fandNlare interposedlbetween the sole channel J5 and the portionccftlthefregenerator chamber-H5 containing checkerabricks R. The latter'fmayr be fcmmechandv arranged in theregeneratorr.chamberaasearetixhecbricksRsshown Figsflf`9 .and'la 'Thelelementsi Usare 'formed lwith.

The-latter are spaced apart to form ports throughwhch thewaste'l heating-gases pass `from theregenerator chamber I-I5down intothe sole-chan nel J5. 'Uprising' ilangel portions U? of 7ther-ele ments U extend longitudinally ofthe'sole'channel at opposite sides of the ports betweenif'the varies" U; and" formseats or guideways on which lorifice members' O aresupported and may-'slide The members O may be identical in con-struction with the members O'shownin' Figs;v 4, arid,` but are vassociated with damper members" QC'-vvhi`ch diier from the previouslymentioned 4damper members Q and QB; inthateach dampenQC-iis adapted to close the port @2in the corresponding 'memberOA and prevent up'ow throughthat port under a' condition in which a-n objectionable upilowV through the' port would otherwise occur. "The refractory 4elements Y*V v#for-m 'supporting ledges for-fthe superposod-'checker bricksgR, and space those' bricks above' the upper' sides off-the members O to provide a suitablegas receiving and distributing "space: W above" they Lrrlemb'ersO. Lean' gas to `be preheated isl passedr into thespace through "metal pipes X distributed" along nand imbedded 'in van-adjacent'-p'illar 'wall' G. fEach pipefXlhas its lower` end connected `toa'-horiaontal lean 1gas supply pipe" Y- imbeddedk `in the icl-ecke, and extending transversely` of thefbattery-for connection at lone side 'off 'thelatter'toea-ilean gas supply main. rIlhe amounti of''-lean^gas`fsup plied through each pipeX may'be rregalati-id-by a corresponding adjustable' or replaceablef ow restricting device X in fthe-inlet end4 of Athe'ypipe and accessible V'-for -adjustment ortreplacement from below theide'ck a through afnormallyplosed lateral':branch Yvrof the pipe LY.

'The ports O2 or"v 'the' apparatus' shownlfinll'igs. l2 and" 13 y:are relatively yproportioned to"-pr'ovide thev 'proper downow 'distributionf ofiy the l =waste heating lgases passing' from fthe regenerator chamber' `H5 into the'soIe channell' "The'inlet adjustment devices'X Avare adjusted to'provide the proper'di'stribution'vof the lean-gas' to Lbe preheated among-the sections of the spacelW- into which the different 'pipes'Xdischarge "The, ports O2f1'permit of leani gas flowT from 'the' space` `W intothe sole 'channelJ5,v butfvanysi'gniicantgas y 'ow from thee-sole channel back into vthejspace'iW is prevented by thepivoted valves or iiap dampers QC. Eachfof thelatter -is gravitatitinallybiasd for movement into the position in which itrengages the. valve seat' of the' corresponding oriiice"member`0. lAny fluid-pressure diiierential which can' make the'p'ressure 'in the portionoi thesole channel adjacent any damper' greater 4than thexpressure in `the.corresponding f port* :G2 will press Vthe valveQC I against 'the corresponding valverseat 3.

vThe dampers QC Athus `'operate'toV preventfany undesirable fvariation inl the 'di'str'ibutiongof the fuel" fgas supplied.' to i vthe regenerator FH5 which might otherwise "result lunder 'some' condition creatingaz'pressure in' the sole Ibhann'el'J5 "higher than" the; pressure 'in some of the-associated ports press ure ini the channelTJ5 higher* than" the' pressure in some of` thev associated 'ports 162-1 would' forms of embodimentofimy invention'nc'w'knovvnto me, ritnwilllbe apparentto theseislilld in the art that changes may be made in the forms of the apparatus disclosed without departing from the spirit of my invention as set forth in ther appended claims and that in some cases certain features of my invention may be used to advantage without a corresponding use of other features.

Having now described my invention, whatI claim as new and desire to secure by Letters Patent, is:

1. The combination with a regenerator having an elongated edge and a sole channel alongside said edge, of a wall interposed between said edge and sole channel and formed with ports distributed along the length of said wall, valve means selectively responsive to the direction of gaseous uid flow through the regenerator and actuated by said now through the regenerator in one direction to subject said ports to a throttling effect and actuated to eliminate said throttling eiect when the ilow through the regenerator is reversed.

2. The combination with a regenerator having an elongated edge and a sole channel alongside said edge of a wall interposed between said edge and sole channel and formed with ports distributed along the length of said wall and having their relative cross sectional areas proportioned to regulate the distribution of gaseous iiuid flow through said ports in one direction and valve means actuated by said fluid now when in the opposite direction to variably modify the relative cross sectional areas of the ports and thereby regulate the distribution of the flow in the opposite direction through said ports.

3. In a regenerative coke oven structure, the combination with a regenerative chamber, of a sole channel alongside said chamber and having one end arranged to receive gaseous uid to be preheated in said chamber during periods alternating with periods in which said sole channel discharges waste heat gases at said end, a wall interposed between said regenerator and sole channel and formed with a plurality of ports distributed along the length of said wall and having their cross sections proportioned to regulate the distribution of flow of waste gases from said chamber into said sole channel, and valve means associated with said ports and actuated by the flow into the regenerator of the gaseous fluid to be ipreheated therein to variably throttle said por s.

4. A combination as specified in claim 1, in which said wall has projections transverse to the length of said channel and extending into the latter, and in which each projection has one side transverse to the length of said channel, and in which said ports have their ends in communication with said channel opening into the latter through said projection sides, and in which said valve means comprise valve members supported by said wall and each arranged for movement by fluid ilow through said channel into said regenerator into a position in which it throttles now through the port opening into the channel through a corresponding one of said sides.

5. A combination as specied in claim fi, in which said valve member is a metal plate hinge connected to said wall.

6. A combination as specified in claim 4, in which said valve member is a metal plate with aligned oppositely extending pivot portions, and in which said wall is formed with portions engaging and supporting said pivot portions.

7. A combination as specified in claim 4. in

12 which said valve member is a one piece metal plate formed with integral, oppositely extending pivot portions, and in which said wall is formed with portions engaging and supporting said pivot portions.

8. A combination as specified in claim 4, in which said valve member is shaped and is arranged for movement into and out of a position in which it extends across and closes a portion of the port which it throttles.

9. A combination as specined in claim 4, in which said valve member is formed with an opening smaller than the port which it throttles and is arranged for movement into and out of a position in which said opening is in register with said port.

l0. The combination with a regenerator having an elongated edge and a sole channel alongside said edge, of a wall interposed between said channel and regenerator and having projections distributed along its length and extending into said channel, and each having one side transverse to said channel, said sides all facing in the same direction, said wall being formed with ports each opening at one end into said regenerator and each opening at its other end into said channel through a corresponding one of said sides, and a separate valve member associated with each projection for movement toward and away from said transverse side of the corresponding projection accordingly as the flow through the ports is into or out of said regenerator, and adapted to throttle said ports on movement toward said projection.

11. The combination with a regenerator having an elongated edge and a sole channel alongside said edge, of a wall interposed between said channel and regenerator and having projections distributed along its length extending into said channel, and each having one side transverse to said channel, said sides all facing in the same direction, said wall being formed with ports each opening at one end into said regenerator and each opening at its other end into said channel through a corresponding one of said sides, and a separate valve member associated with each projection for movement toward and away from said transverse side of the corresponding projection, and responsive to the direction of flow through said ports and arranged to be moved toward said side by flow through said port into the regenerator.

l2. Regenerator apparatus for preheating lean .fuel gas comprising in combination, an elongated regenerator chamber, a sole channel alongside said chamber, a wall interposed between said chamber and sole channel, checker brickwork in said chamber including wall portions arranged to form a plurality of passages transverse to and distributed along the length of the regenerator, and each having one end adjacent said wall, a separate lean gas supply conduit in communication with the end of each of said passages adjacent said sole channel, said wall being formed with ports for the separate iiow of waste heat gases into the sole channel from the different passages during reversal periods in which the passage of lean fuel gas into said regenerator chamber through said conduits is interrupted, and separate valve means associated with each port and actuated to close the latter by an excess in the sole channel pressure over the pressure in the adjacent passage.

13. In a regenerative coke oven of the type comprising a regenerator chamber, a sole channel in communication with one edge of said chamber at points distributed along its length, heat- 13 ing flues connected to the opposite edge of said chamber and an upper horizontal flue to which the upper ends of said flues are connected, the improvement comprising a wall interposed between said regenerator and sole channel and formed With a plurality of ports distributed along the length of said Wall and proportioned to regulate the distribution of gaseous flow through the ports from the regenerator into the sole channel, and Valve means associated with the different ports and actuated by gaseous 110W through said ports into the regenerator to throttle said ports.

CARL OTTO.

References Cited in the le of this patent UNITED STATES PATENTS Number 5 1,400,506 1,788,358 2,151,512 2,334,612

Number Name Date Abram Dec. 20, 1921 Goerg Jan. 6, 1931 Hagen Mar. 21, 1939 Davis Nov. 16, 1943 FOREIGN PATENTS Country Date Great Britain Dec. 20, 1939 

10. THE COMBINATION WITH A REGENERATOR HAVING AN ELONGATED EDGE AND A SOLE CHANNEL ALONGSIDE SAID EDGE, OF A WALL INTERPOSED BETWEEN SAID CHANNEL AND REGENERATOR AND HAVING PROJECTIONS DISTRIBUTED ALONG ITS LENGTH AND EXTENDING INTO SAID CHANNEL, AND EACH HAVING ONE SIDE TRANSVERSE TO SAID CHANNEL, SAID SIDES ALL FACING IN THE SAME DIRECTION, SAID WALL BEING FORMED WITH PORTS EACH OPENING AT ONE END INTO SAID REGENERATOR AND EACH OPENING AT ITS OTHER END INTO SAID CHANNEL THROUGH A CORRESPONDING ONE OF SAID SIDES, AND A SEPARATE VALVE MEMBER ASSOCIATED WITH EACH PROJECTION FOR MOVEMENT TOWARD AND AWAY FROM SAID TRANSVERSE SIDE OF THE CORRESPONDING PROJECTION ACCORDINGLY AS THE FLOW THROUGH THE PORTS IS INTO OR OUT OF SAID REGENERATOR, AND ADAPTED TO THROTTLE SAID PORTS ON MOVEMENT TOWARD SAID PORJECTION. 